Improvement in hemp-hatcheling machines



G'.w. PHTMAN. l I

lrmprovementvin Hemp Hatchelfing Machines.

N0. 116,092.. I l Patentedjune 20,1871.

UNITED *STATES PATENT OFFICE.

GEORGE W. PITTMAN, OF BROOKLYN, N. Y., ASSIGNOR TO SAMUEL I. THURSBY, OF PLACE, AND 'I ODD & RAFFERTY, OF PATERSON, N. J

IMPROVEMENT IN HEMP-HATCHELING MACHINES.

Specification forming part of Letters Patent No. 116,092, dated June 20, 1871.

To all whom it may concern: Beit known thatl, GEORGE W. P1TTMAN,

of Brooklyn, in the county of Kings and State of New York, have invented anImproveInent in Hatcheling and Drawing Hemp, te.; and

'the following is declared to be a correct description of the same. p v

In hatcheling hemp the hank of -ber is usually cleaned and drawn out by hand upon a stationary comb, and then the ber is drawn into the lapper by a lpair of rollers and wound upon the cylinder, and then taken off by hand in a hank. The efforts heretofore made to perform these operations ina machine, so as to deliver the ber in a sliver instead of a hank, have not met with complete success.

Myinvention, resulting from extended experiments, consists in the employment of primary and secondary combing-cylinders, in combination with feed-rollers and delivery-rollers, the

parts being arranged and speeded in such a. manner that there is anacceleration in the' speed of surface gradually from the feedingrollers to the delivery-rollers, and hence a gradual drawing of the ber, as Well as a combing of the same; thereby the bers are straightened and delivered continuously in the form of a sliver or roving that is adapted to the subsequent operations of drawing or spinning for the manufacture of ropes, cords, dto.

In the drawing, Figure 1 is a vertical section of the-said machines, and Fig. 2v is a plan of the same.

a a are the feed-rollers; b, the rst combingcylinder; and c, the secondary combing-cylinder. These cylinders are armed with rows of needle-pointed teeth, the teeth of the cylinderl b standing radially, while those of the cylinder c are inclined, as shown. The drawing-rollers e e are applied between the secondary combingcylinder c and the converging trough d that directs the sheet of ber to the grooved sliverrollers ff. The upper rollers e f are mounted in swinging bearings g h, so that they may be lifted by the bars k l and weighted, if necessary, to keep them together with the necessary pressure.

The feed-rollers a a,combingcy1inder b, auxiliary combingcylinder c, drawing-roller e e',

and delivery feed-rollers f f are to be driven at the proper relative speeds by suitable belts or gearing-the pulleys and wheels represented being convenient means for this object. The

parts, however, are to be proportioned so that a gradual increase in the speed of surface is obtainedthat is to say, the surface ofthe feed-rollers should move with a speed that may be represented by one, and the surface speed of the combing-cylinderb should be about twice as much,so as to comb out the ber that is passed in by said feed-rollers; and the secondary combing-cylinder c should move with a speed still faster, such as may be represented by four, to still further comb and draw the ber and then the drawing-rollers e e move still faster to draw the bers out straight and comb them as they are pulled off the inclined teeth of the secondary combing-cylinder c. Thereby there is a constant combing-and-drawing action that straightens out the bers and causes them to be delivered in the form of a sliver continuously, without the risk of being knotted and delvered in masses, asin the machines'heretofore made for actingupon ber by belts of gillbars. Y

I am aware that cylinders containing gill-bars have been employed in connection with feeding and delivery-rollers 5 these are liable to get out of order and do not act to open and comb the lbers as in my machine, because the-inclined teeth of the cylinder c act to pull and comb the ber from the straight teeth of the cylinder b.

I claiml as my-invention- The cylinder b armed with radial-pointed teeth, andthe cylinder c armed with inclinedpointed teeth, the lattertravelin g faster thanthe former so as to draw and comb the ber,

in combination with the feeding-rollers a a,

and drawing-rollers e, as and for the purposes set forth.

Signed by me this 6th day of March, 1871. l GEO. W. PITTMAN.

Witnesses:

. GHAs. H. SMITH,

LEMUEL W. SEBRELL. 

